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Using WinCC as OPC Client for OPC Server MP370 via WiFi

Created by: Alekkk at: 4/23/2008 5:04 PM (4 Replies)

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4/23/2008 5:04 PM	Rate (0)
Alekkk Member Joined: 4/23/2008 Last visit: 8/8/2023 Posts: 3 Rating: (0)	Hi, guys! I'm using WinCC 6.0asOPCClient for accessing tagsfrompanel MP370actedasOPCServer. I'am using OPC XML Wrapper fortranformingfromXML. Connection WinCC->MP370 via WiFi andoften I have someconnectionfailures.Afterthelongconnectionfailures WinCC tagsnotbeeingupdatedandhad relevantvalues,butifIconnectsametagsbyOPCScout atOPCXMLWrappertheywasrelevantandcyclicallybeeingupdated.WinCCtagstakes relevantvaluesafterrestartingWinCCRTorsometimesafterinquiringthembyOPCScout. I think, there is problem with refreshingWinCCtags via OPC driver. May be, someothervariants?

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4/24/2008 5:53 PM	Rate (0)
Khaled_Ezzat Silver Member Joined: 9/7/2007 Last visit: 8/30/2023 Posts: 550 Rating: (61)	try to make your refresh upon change this may guide you to the error location
	Best Regards
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4/26/2008 1:07 AM	Rate (0)
candyengineer Silver Member Joined: 5/17/2006 Last visit: 8/28/2023 Posts: 218 Rating: (26)	Hello , Just a small idea; write an action, this action will toggle the bit. put it into cycle 1second your connection could stay alive... I had a problem with S7 300 CPU & other party scada software, I ve written that small code, and it works, best regards Attachment candy.JPG (39 Downloads)
	Genetic Fuzzy PID Controller
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4/29/2008 1:09 PM	Rate (0)
Alekkk Member Joined: 4/23/2008 Last visit: 8/8/2023 Posts: 3 Rating: (0)	I do timingby usingOPCtags withthe5secondscycleandreadsometagswith2secondscycle,butproblemisremaining. Thanks in any case.

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4/29/2008 1:58 PM	Rate (0)
Krish Silver Member Joined: 5/24/2007 Last visit: 9/7/2023 Posts: 284 Rating: (27)	Hi Alekkk It is not possible atleast for me to guess what could be wrong with so many varables in this issue. Could you look for the following info and see if you can figure out any trouble or post here in the forum so that we can look into it. 1. Allow the OPC trace to run in the OPCclient computer and check in the log when problem comes. This allows us to see what is going on with the OPC 2. Check the OPC log file in C:\Program Files\Siemens\WINCC\Diagnose . Here you can figure out what problems are with WinCC. 3. Since you mentioned that there is some wireless, see if there aer som issues there also.

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